You asked
How much habitable space per km2 exists throughout the 5 continents of the whole world?
What is the habitable space per km2 individually of England, Wales, Scotland and Northern Ireland?
What percentage is question 2 of question 1?
What percentage has the south east region of England alone of the world's total habitable space?
How is population growth measured, precisely (other than 10 year censuses) so as to know accurately a total of those over 18 who could register to vote?
For the Referendum in June 2016, which Electoral Register was used, the local Council one or the Parliament one and where is the latter held?
Is it correct that now it is an obligatory requirement to produce a National Insurance Number in order to register to vote?
Insofar that a National Insurance Number has no photo, finger print, iris ID, does a need to present this number in order to register to vote, encourage ID fraud and robbers?
Has an automatic registered number (voting registration number) on a birth certificate at the birth of a baby ever been considered? (This could assist in some way how to calculate accurate population growth.)
Given that the abundance of care homes for the elderly is highly likely to increase in population, does the Electoral office have a total number for those elderly residents and do officials assist the registration of those residents who are mentally capable?
We said
The Office for National Statistics (ONS) does not hold data on habitability at the global, continental and national level or sub-national level. Although we produce Geography statistics, we are unable to provide information relating to habitable space, therefore, we cannot provide a response for questions 1 - 4. Please contact ONS Geography directly to see what information they are able to supply: ons.geography@ons.gov.uk
In response to question 5, between census years we calculate population estimates using the cohort component method, this is described in detail here, https://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/populationestimates/methodologies/methodologyguideformid2015ukpopulationestimatesenglandandwalesjune2016. Estimates produced by both the Census and the cohort component method are based on the idea of “usual residence” (this is discussed in the link above), and it should be noted that some people usually resident in the UK will not be eligible to register to vote, and some people eligible to register will not be usually resident in the UK.
You may also be interested in the latest population estimates (for the year ending 30th June 2015) which can be found here, http://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/populationestimates/bulletins/annualmidyearpopulationestimates/mid2015
ONS does not hold any information for questions 6 - 10. We are unsure of who would hold this information but would suggest that you contact the Electoral Commission: http://www.electoralcommission.org.uk/contact-us